| 天然水中NO2-和NO3-的毛细管电泳分离测定 |
| 摘要点击 1328 全文点击 1193 投稿时间：1996-02-28 |
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| 中文关键词 高效毛细管电泳 硝酸根 亚硝酸根 |
| 英文关键词 nitrite nitrate internal standard method capillary electrophoresis |
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| 中文摘要 |
| 在pH8.2硼酸缓冲液中,用高效毛细管电泳分离亚硝酸根,硝酸根,并用内标法直接检测了矿泉水,井水中的NO2-、NO3-.以CTAB为电渗流改性剂,离子迁移时间相对标准偏差小于1.5%;二甲亚砜作为内标,样品对内标的峰高比重现性较好.检测下限NO2-为2.5×10-11 mol/L,NO3-为1.8×10-11Mol/L,分析结果与离子色谱对照,符合较好。 |
| 英文摘要 |
| Nitrite and nitrate in mineral water and well water have been determined by capillary electrophoresis with internal standard method at 211 nm in pH8.2 borate buffer. Cetyltrimethylammonium bromide (CTAB) was used as electroosmotic flow modified (EOF) reagent, and the reproductivity RSDs of migration time for nitrite and nitrate anions were less than 1.5%. Dimethyl sulfoxide(0.05%) was applied as the internal standard in this detection, and the RSDs of peak high ratio of anions to dimethyl sulfoxide were around 20% for the concentration at μg/g level. Detection limits for nitrite were 2.5×10-11 mol, and 1.8×10-11 mol, respectively. The results were good agree with the results of ion chromatography. |
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